Development of tuneable Fabry-Pérot sensors for parallelised photoacoustic signal acquisition

  • Fabry-Pérot (FP) sensors have enabled high resolution 3D photoacoustic (PA) imaging in backward mode. However, raster-scanning of the interrogation laser beam across the sensor can result in slow 3D image acquisition. To overcome this limitation, parallelized PA signal acquisition can be used for which FP sensors with uniform optical thickness are required. In this work, the optical thickness is tuned a) irreversibly through the use of a photopolymer host matrix and b) actively using embedded electro-optic (EO) chromophores. Polymer spacers (5 μm) were deposited using spin coating and sandwiched between two dielectric mirrors and transparent ITO electrodes. The employed polymer guest-host system consists of an EO chromophore (2-methyl-4-nitroaniline) and poly(vinyl cinnamate). EO tuneability was induced using contact poling and a tuneability of 68 pm was demonstrated. The optical thickness was homogenised by raster scanning a UV beam whilst varying the exposure time across a 4 mm2 detection aperture.

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Author:Claus VillringerORCiD, Taravat Saeb Gilani, Edward Zhang, Silvio Pulwer, Patrick SteglichORCiD, Sigurd SchraderORCiD, Jan LauferORCiD
URN:urn:nbn:de:kobv:526-opus4-13769
DOI:https://doi.org/10.1117/12.2509437
ISSN:1996-756X
Parent Title (English):Proc. SPIE 10878, Photons Plus Ultrasound: Imaging and Sensing 2019, 108780M (8 March 2019)
Document Type:Conference Proceeding
Language:English
Year of Publication:2019
Publishing Institution:Technische Hochschule Wildau
Release Date:2021/02/16
Source:Claus Villringer, Taravat S. Gilani, Edward Zhang, Silvio Pulwer, Patrick Steglich, Sigurd Schrader, and Jan Laufer "Development of tuneable Fabry-Pérot sensors for parallelised photoacoustic signal acquisition", Proc. SPIE 10878, Photons Plus Ultrasound: Imaging and Sensing 2019, 108780M (8 March 2019); https://doi.org/10.1117/12.2509437
Copyright:Copyright (2019) Society of Photo‑Optical Instrumentation Engineers (SPIE). One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this publication for a fee or for commercial purposes, and modification of the contents of the publication are prohibited.
Faculties an central facilities:Fachbereich Ingenieur- und Naturwissenschaften
Dewey Decimal Classification:6 Technik, Medizin, angewandte Wissenschaften / 62 Ingenieurwissenschaften / 621 Angewandte Physik
Licence (German):Das Dokument ist urheberrechtlich geschützt
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